Dowel cutting and chamfering machine.



G. E. KUNTZ.

DOWEL CUTTING AND CHAMFERING MACHINE.

APPLICATION FILED P3125, 1910.

Patented Oct. 17, 1911'.

4 BHEETSBHEET 1.

@"fi llll COLUMBIA PIANOGRAPH CO WASHlNflTOU, D. C.

G. E. KUNTZ.

DOWEL CUTTING AND OHAMFBRING MACHINE.

APPLICATION FILED I'EB.25, 1910.

Patented 001;. 17, 1911;

4 SHEETS-SHEET 2.

COLUMBIA PLANOCIRAPH c0, WASHINGTON, D. c.

G.E.KUNTZ. DOWEL GUTTING AND GHAMPEBING MACHINE.

APPLICATION FILED FEB. 26, 1910.

. 1 005 9 2 Patented Oct. 17, 1911.

4 SHEETS-SHEET 3.

U. E. KUNTZ.

DOWEL CUTTING AND CHAMFERING MACHINE. I

APPLIOATIQN FILED 33.25, 1910.

1,005,982. Patented Oct.17,1911.

4 SHEETS-SHEET 4.

COLUMBIA PLANOGRAPH (10., WASHINGTON. n c,

CHARLES E. KUNTZ, OF SOUTH BEND, INDIANA.

DOWEL CUTTING AND CHAMFERING MACHINE.

Specification of Letters Patent.

Patented Oct. 17, 1911.

Application filed February 25, 1910. Serial No. 545,871.

To all whom it may concern:

Be it known that I, CHARLES E. KUNTZ, a citizen of the United States of America,

and resident of South Bend, St. Joseph county, Indiana, have invented a certain new and useful Improvement in Dowel Cutting and Chamfering Machines, of which the following is a specification.

My invention relates to machines for making dowel pins. In a machine of this kind the long rods of wood are fed to the saws and thereby reduced to short lengths suitable for dowel pins. Each saw is provided'with means for beveling or chamfering the ends of the short lengths. Thus the long rods are, one after the other, sawed into short sections which are suitable for use as dowel lIlS.

p The object of my invention is to provide a machine of this character in which efficient means are employed for accurately present ing the rods to the saws and chamfering devices, and in which a greater facility and range of adjustment are afforded for insuring accuracy of cutting, with rods of different diameters, and whereby the operation of converting the long rods of wood into dowel pins may be carried on with rapidity and certainty, as will hereinafter more fully appear.

In the accompanying drawingsFigure 1 is a side elevation of a dowel cutting and chamfering machine embodying the principles of my invention, the rods of wood being viewed from their ends, and being shown in position for sawing and chamfering, it being understood that they move by gravity and are then successively presented to the circular saws and chamfering devices. Fig. 2 is a cross section on line 22 in Fig. 3. Fig. 3 is a plan of the machine shown in Fig. 1. Fig. 4 is a detail sectional view on the line 44 in Fig. 2 showing the drum and saws, etc, in elevation. Fig. 5 is a detail sectional view, broken away at the center, on line 55 in Fig. 2. Fig. 6 is a detail sectional view, on an enlarged scale, of one of the devices for holding thesto bar in place. F 7 is a side elevation o the device shown in Fig. 6. Fig. 8 is a section, on an enlarged scale, on line 8-8 in Fig. 2,

showing only one endof the machine. Fig.-

9 is a section on line 99 in Fig. 8. Fig. 10 is a perspective of one of the bars that form the table upon whichthe rods rest whilebeing fed forward and-while being sawed and rights 0.

1 reasons:

chamfered. Fig. 11 is an enlarged View of one of the end saws and chamfering devices. Flg. 12 shows a section of the rod before it is chamfered. Flg. 13 shows the said section chamfered to form a dowel pin.

. thus illustrated,my invention comprises a frame A upon which the various operative parts are mounted in suitably elevated positions. The saw shaft B is disposed horizon tally above the table and mounted in bearings Z). This shaft has mounted thereon the circular saws b, which have the chamfering cutters at each side thereof, and which are spaced apart by the sleeves The end portions of this shaft B are threaded and provided with nuts 5 by which the saws and chamfering devices and sleeves are all clamped tightly together to rotate with the shaft. This shaft B is driven by a pulley b, or in any suitable manner. A shaft C is arranged parallel with said shaft B, and is mounted in bearings 0, which latter are carried by the sliding blocks 0. By means of the screws 0 the bearings c are raised and lowered, and by means of the screws 0 the said bearings and blocks are moved horizontally toward-and away from the shaft B. The screws 0 it will be observed, connect the blocks 0 with the up- Thus the shaft C can be raised and lowered or moved laterally, to obtain curve downward, as shown. These bars are mounted on the shaft C and have their rear 7 ends provided with set screws cl that engage the lower surface of the stop bar (Z The said bar (Z is provided at its ends with sockets (Z adapted to receive the eccentric pins (Z* on the ends of the plug screws (Z which latter are screwed into threaded openings in the uprights 0*. The said bar (Z is prevented from turning by the flanges (Z on the saiduprights, which embrace the ends of the bar. By adjusting the screw d the bars D can be given tilting adjustment on the shaft G, each bar being thus adjustable independently of the others. By rotating the screws (Z the eccentric pins (Z will be caused to raise and lower the bar (Z thus adjusting all of the bars D simultaneously.

'Obviously, therefore,' the bars D are easily and accurately adjustable relative to the sawsand chamfering devices, with reference to "different thicknessesof rods, or for other The rods of wood are held in a sort of hopper or trough E which has an opening or slot 6 through which the rods may pass one at a time and roll down the incline c. From this incline the rods pass to the bars D and then roll over the saws.

A large drum F is mounted above the saws and supported upon the swinging arms f. Another drum f is mounted in bearings f lower down and back of the saws. The belts f travel around these drums, and are arranged close to and at each side of the saws, as shown, with enough slack therein to conform to the curvature of the portion (Z. These belts f rest upon the rods, and are driven in the direction indicated by a pulley on the shaft of the drum f. This operates to feed the rods to the saws, as the rods roll under the drum F and then across the saws. The belts f are kept in proper condition by ,the belt tighteners G which rest thereon.

These tighteners are arranged to swing upon a shaft 9 that is mounted on arms 9 which are rigid with the arms These idlers G serve also to keep the belts in place, and prevent them from running over onto the saws. The arms are adjustably sup ported by screws II that rest upon the tops of the bearings Z). These adjustable supports H are readily removable from the said bearings Z), so that the drum I and the belts can be lifted up and thrown over away from the saws.

Thus it will be seen that by my invention I provide a dowel cutting and chamfering machine in which the rods of wood are sawed and chamfered at the same time, and in which the rod supporting mechanisms consist of bars which are adjustable in unison, in two ways, and which are each individually adjustable, whereby accurate operation is obtained, and different thicknesses or diameters of rods can be handled by the machine.

The weight of the ends I of the arms 1) is suflicient to keep their ends (Z raised to keep the rods pressed tightly against the belts, should the pressure of the belts relax; but ordinarily the weight of the belts and rods keeps the screws (Z pressed tightly against the bar (Z as shown.

hat I claim as my invention is:

1. In a machine of the class disclosed, in combination with cutting devices, supporting mechanism comprising pivoted bars, said bars arranged parallel in the same horizontal plane, means for adjusting each bar independently of the others, means for adjusting the bars in unison, and means for rolling rods over said bars, said bars being unsupported at their rear ends.

2. In a machine of the class disclosed, in combination with cutting devices, means for feeding rods, supporting mechanism comprising pivoted bars, said bars arranged parallel in the same horizontal plane, means for raising and lowering the bars at one end in unison, means for raising and lowering the bars at the other end in unison, and means for rolling rods over said bars, said bars being adjustable endwise with-out disturbing the position of said feeding means.

3. In a machine of the class disclosed, means for feeding rods, supporting mechanism comprising parallel pivoted bars, said bars arranged parallel in the same horizontal plane, a support on which the bars are adapted to tilt, means for raising and lowering the outer ends of said bars, to tilt them about said support, cut-ting devices juxtaposed to the inner ends of said bars, to receive the rods therefrom, and means for rolling rods over said bars, said cutting devices being inside of said support, said bars being unsupported at their rear ends, said bars being adjustable endwise without disturbing the position of said feeding means.

4:. In a machine of the class disclosed, supporting mechanism comprising pivoted bars, said bars arranged parallel in the same horizontal plane, a support therefor, means whereby each bar is movable about said support independently of the others, means for adjusting the bars in unison, cutting devices juxtaposed to the inner ends of said bars, and means for rolling rods over said bars, said cutting devices being inside of said support, said bars being unsupported at their rear ends.

5. In a machine of the class disclosed, a plurality of movable bars, saws disposed in position to extend within the ends of said bars, a support for said bars, a stop bar above the said bars, means for adjusting said stop bar vertically, means on said bars for engaging the bottom of said stop bar, means for moving rods over said bars to said saws, and means for moving the bars endwise without disturbing said stop bar.

6. In a machine of the class disclosed, rodsupporting mechanism comprising bars pivoted or fulcrumed with their heavier ends outward, whereby their inner ends tend to rise, saws juxtaposed to said inner ends, the bars being between the saws, belts which press down upon the rods above the said inner ends of the bars, the fulcrum of said bars being disposed outside of the circumference of said saws, and means for limiting the upward movement of the heavier ends of said bars.

7. In a machine of the class disclosed, a plurality of bars, saws and chamfering devices'juxtaposed to the inner ends of said bars, means for raising and lowering the said bars,'means for depressing or raising the outer ends of the bars in unison, means for adjusting the bars individually, and means for moving the bars horizontally.

8. In a machine of the class disclosed, adapted for cutting up rods, a stop bar, eccentric devices for raising and lowering said bar, a set of movable bars for supporting the rods, means for movably supporting the bars, a set screw in each of said bars, normally engaging the bottom of said stop bar, said set screws being disposed in a row below the bar, and cutting devices juxtaposed to the inner ends of the bars, adapted to receive the rods therefrom.

9. In a machine of the class disclosed, rod supporting mechanism comprising a plurality of parallel movable bars, means for movably supporting the bars, a stop member disposed across the ends of said bars, and a set screw in the outer end of each bar, said set screws being disposed in a row below said member and thereby normally engaging the bottom of said stop member.

10. In a machine of the class disclosed adapted for cutting up rods, a set of feed belts, a drum for said belts, means for adjustably supporting the same in position for operation, so that the belts are always supported in operative position and remain in such position when no rods are in the machine, adapted to prevent the drum from rising, and means tending to lift the rods upwardly against the under side of said belts, whereby the drums and belts are held against free floating movement, and the said bars and rods thereon are left free to float relative to said drum and belts.

Signed by me at South Bend, Indiana, this 17th day of February, 1910.

CHAS. E. KUNTZ.

WVitnesses:

GAYLoRD H. CASE, CHAs. F. HOLLER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, 

